Bussmann Current Limiting Fast Acting Fuse JJN Series 800A 300VAC/170VDC Class T Bolted Blade End VFD Protection

Bussmann Current Limiting Fast Acting Fuse JJN Series 800A 300VAC/170VDC Class T Bolted Blade End VFD Protection

Professional-Grade VFD Line Protection and Current Limiting Technology

The Bussmann Current Limiting Fast Acting Fuse JJN Series delivers superior electrical protection and circuit safety for variable frequency drive applications and high-current industrial systems. This Class T fast acting fuse features advanced current-limiting technology designed for electrical contractors, industrial facilities, and commercial installations, providing the reliable overcurrent protection and industry-leading safety that electrical professionals demand for VFD line protection and power distribution systems.

Professional Features & Benefits

Current Limiting Protection

• 800A Current Rating - Handles high-current applications with reliable overcurrent protection and fault clearing capability
• Current Limiting Technology - Reduces let-through energy and peak fault currents for enhanced electrical system protection
• Very Fast Acting Response - Provides rapid fault clearing to protect sensitive VFD equipment and downstream components
• Class T Design - Compact form factor with superior current limiting performance for space-constrained installations

Safety & Standards Compliance

• CE Marked Certification - Meets European safety standards for international electrical installations and export applications
• High Interrupt Rating - 100 kAIC at 170 VDC and 200 kAIC at 300V for reliable fault current interruption
• Non-Indicating Design - Professional-grade construction without visual indication for cost-effective protection solutions

Technical Specifications

This professional-grade fuse features 800A current rating, dual voltage capability of 300VAC/170VDC, Class T current limiting design, bolted blade end connections on both ends, 100 kAIC interrupt rating at 170VDC, compact dimensions of 1.75" x 1.75" x 3.38", and weighs 0.85 lb for reliable installation in industrial electrical panels and VFD applications.

Installation & Setup

1. Verify electrical system is de-energized and follow proper lockout/tagout procedures for safe fuse installation
2. Confirm fuse amperage rating matches or is slightly higher than circuit load requirements for proper overcurrent protection
3. Install fuse with bolted blade end connections ensuring proper torque specifications and secure electrical contact
4. Verify voltage rating compatibility with system voltage (300VAC or 170VDC) before energizing circuit
5. Test installation with appropriate electrical testing equipment to confirm proper circuit protection
6. Document installation details and fuse specifications for maintenance records and electrical safety compliance

Professional Applications

Ideal for:

• VFD Line Protection - Primary application for protecting variable frequency drives and motor control systems from overcurrent conditions
• Industrial Motor Circuits - High-current motor protection in manufacturing facilities, processing plants, and industrial machinery
• Power Distribution Systems - Main and feeder circuit protection in electrical panels and switchgear applications
• Commercial HVAC Systems - Large commercial air handling units, chillers, and building automation systems requiring high-current protection
• Manufacturing Equipment - Production machinery, conveyor systems, and automated equipment with high-current electrical demands
• Data Center Infrastructure - UPS systems, power distribution units, and critical facility electrical protection
• Renewable Energy Systems - Solar inverters, wind turbine systems, and energy storage applications requiring current limiting protection
• Marine and Transportation - Ship electrical systems, rail transportation, and mobile equipment with high-current protection needs

Current Limiting Technology Advantage

Bussmann's advanced current limiting technology in the JJN Series provides superior arc suppression and fault current limitation compared to standard fuses. The very fast acting response time combined with Class T current limiting design reduces let-through energy, minimizes equipment damage during fault conditions, and enables selective coordination with downstream protective devices for enhanced electrical system reliability and safety.

Why Choose Bussmann Quality?

Bussmann demonstrates unwavering commitment to electrical safety through CE marking compliance, professional-grade current limiting technology, and reliable overcurrent protection designed specifically for VFD applications and high-current industrial systems. Every fuse undergoes rigorous testing to ensure consistent performance, fault clearing capability, and electrical system protection that electrical contractors and facility managers trust for critical power distribution and motor protection applications.